Three-Point Hitch Lift Link Assembly Pin Positioning Modes
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Solution Overview
Problem
Existing three-point hitch systems require manual and time-consuming adjustment of lift links, making it difficult to determine the correct length for switching between operational and transport modes, especially when multiple implement clearances need to be managed.
Innovation Solution
The lift link assembly includes a pin and yoke configuration that allows for adjustable modes (retracted, floating, and extended) by positioning the pin relative to the attachment point, reducing the need for frequent adjuster use and enhancing flexibility between operational and transport positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the lift link is shortened manually by rotating the rotatable length adjuster, then the three-point hitch and implement can be raised for transport or to clear secondary implements, but the adjustment process is time-consuming and difficult
Solution Approach 1:
The lift link assembly is segmented into discrete positional modes (retracted, floating, extended) rather than requiring continuous manual adjustment. The pin can be quickly positioned at predetermined locations along the shaft, enabling rapid mode switching without time-consuming rotation of adjusters.
Solution Approach 2:
The shaft includes predetermined positions that are pre-configured for different operational modes. The pin can be directly positioned at these pre-determined locations, eliminating the need for iterative manual adjustment and reducing the time required to achieve the correct lift link length.
2Reliability
If the lift link length is set to an ideal length for using a given implement, then optimal performance is achieved, but it becomes difficult to determine how many times to counter rotate the adjuster to return to the ideal length
Solution Approach 1:
The shaft includes visual indicators or markings at predetermined positions that provide feedback to the operator about the current mode. This feedback mechanism eliminates the uncertainty of counting rotations and ensures the pin is positioned at the correct location for optimal implement performance.
Solution Approach 2:
The continuous manual rotation mechanism is replaced with a discrete positioning system using a pin and shaft configuration. This substitution eliminates the need for precise counting of rotations while maintaining reliable positioning at ideal lengths for implement performance.
3Adaptability or versatility
If manual adjustment of the lift link is used, then the system can adapt to different transport and operational needs, but the operator effort and complexity increase
Solution Approach 1:
The lift link assembly provides dynamic adaptability through discrete modes (retracted, floating, extended) that can be quickly switched via pin positioning. This maintains versatility for different operational needs while significantly reducing operator effort compared to continuous manual adjustment.
Data Source
AI summary
A lift link assembly of a three-point hitch. The lift link assembly includes a pin, a yoke, and a shaft. The yoke includes a main housing and first and second side arms that extend downwardly therefrom. The shaft includes a shank and a head positioned on a lower-end thereof. The shank is positioned in an upper-end through hole of the main housing, and the head includes an attachment point that receives the pin when the lift link assembly is in certain modes.